I have a form in which I used an xtype = container. I set the html property to an html image tag. When the form displays it shows the image. However, I want to change the image while the form is displayed when I select a different record in the grid. I can't seem to get this to work. I've tried several ways but nothing works. It looks like this property is actually set in the "initialConfig" when I view the object in the console. I could be going about this all wrong so any tips would be appreciated.